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全部文章（共211篇）

正则表达式的常用操作符

2020-12-21

0 311

Python爬虫基本框架

import requests def getHTMLText(url): try: r = requests.get(url, timeout=30) r.raise_for_status() # 如果不是200，引发HTTPError异常 ...

2020-12-21

0 312

Python爬虫基础

from lxml import etree import requests from urllib import request url = "http://www.baidu.com/" req = request.Request(url) response1 = reque...

2020-12-21

1 423

Python爬虫之post

import requests r1=requests.get("http://httpbin.org") r2=requests.get("http://httpbin.org/post") payload={'key1':'value1','key2':'...

2020-12-21

0 327

requests库之IP归属地查询

import requests url = "http://m.ip138.com/ip.asp?ip=" def getIPAddressa(ip): try: req = requests.get(url + ip) req.rai...

2020-12-21

0 363

bs4之标签树的下行遍历

import requests from bs4 import BeautifulSoup def bianliSoup(url): r = requests.get(url, timeout=30) r.raise_for_status() r.encoding = ...

2020-12-21

0 326

bs4之标签树的平行遍历

# 平行遍历的内容不一定是标签，还可能是string import requests from bs4 import BeautifulSoup url = "https://python123.io/ws/demo.html" r = requests.get(url, tim...

2020-12-21

0 526

bs4之标签树的上行遍历

import requests from bs4 import BeautifulSoup url = "https://python123.io/ws/demo.html" r = requests.get(url, timeout=30) r.encoding = r.app...

2020-12-21

0 372

百度和360的关键词提交查询

import requests url1 = "http://www.baidu.com/s" # 百度 url2 = "http://www.so.com/s" # 360 def getHTMLText(url): try: ...

2020-12-21

0 447

bs4爬取网页基础

import requests from bs4 import BeautifulSoup def getSOUP(url): try: r = requests.get(url, timeout=30) r.raise_for_status() ...

2020-12-21

0 431